God was necessary as an unconditional sanction which has no superior, as a "Categorical Imperator": or, in so far as people believed in the authority of reason, what was needed was a "unitarian metaphysics" by means of which this view could be made logical.
Now, admitting that faith in God is dead: the question arises once more: "who speaks?" My answer, which I take from biology and not from metaphysics, is: "the gregarious instinct speaks." This is what desires to be master: hence its "thou shalt!"—it will allow the individual to exist only as a part of a whole, only in favour of the whole, it hates those who detach themselves from everything—it turns the hatred of all individuals against him.
276.
The whole of the morality of Europe is based upon the values which are useful to the herd: the sorrow of all higher and exceptional men is explained by the fact that everything which distinguishes them from others reaches their consciousness in the form of a feeling of their own smallness and egregiousness. It is the virtues of modern men which are the causes of pessimistic gloominess; the mediocre, like the herd, are not troubled much with questions or with conscience—they are cheerful. (Among the gloomy strong men, Pascal and Schopenhauer are noted examples.)
The more dangerous a quality seems to the herd, the more completely it is condemned.
277.
The morality of truthfulness in the herd. "Thou shalt be recognisable, thou shalt express thy inner nature by means of clear and constant signs—otherwise thou art dangerous: and supposing thou art evil, thy power of dissimulation is absolutely the worst thing for the herd. We despise the secretive and those whom we cannot identify.—Consequently thou must regard thyself as recognisable, thou mayest not remain concealed from thyself, thou mayest not even believe in the possibility of thy ever changing." Thus, the insistence upon truthfulness has as its main object the recognisability and the stability of the individual. As a matter of fact, it is the object of education to make each gregarious unit believe in a certain definite dogma concerning the nature of man: education first creates this dogma and thereupon exacts "truthfulness."
278.
Within the confines of a herd or of a community—that is to say, inter pares, the over-estimation of truthfulness is very reasonable. A man must not allow himself to be deceived—and consequently he adopts as his own personal morality that he should deceive no one!—a sort of mutual obligation among equals! In his dealings with the outside world caution and danger demand that he should be on his guard against deception: the first psychological condition of this attitude would mean that he is also on his guard against his own people. Mistrust thus appears as the source of truthfulness.
279.